/* eslint-disable */
import { saveAs } from "file-saver";
// import XLSX from 'xlsx'
import * as XLSX from "xlsx";

function generateArray(table) {
    var out = [];
    var rows = table.querySelectorAll("tr");
    var ranges = [];
    for (var R = 0; R < rows.length; ++R) {
        var outRow = [];
        var row = rows[R];
        var columns = row.querySelectorAll("td");
        for (var C = 0; C < columns.length; ++C) {
            var cell = columns[C];
            var colspan = cell.getAttribute("colspan");
            var rowspan = cell.getAttribute("rowspan");
            var cellValue = cell.innerText;
            if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;

            //Skip ranges
            ranges.forEach(function (range) {
                if (
                    R >= range.s.r &&
                    R <= range.e.r &&
                    outRow.length >= range.s.c &&
                    outRow.length <= range.e.c
                ) {
                    for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
                }
            });

            //Handle Row Span
            if (rowspan || colspan) {
                rowspan = rowspan || 1;
                colspan = colspan || 1;
                ranges.push({
                    s: {
                        r: R,
                        c: outRow.length,
                    },
                    e: {
                        r: R + rowspan - 1,
                        c: outRow.length + colspan - 1,
                    },
                });
            }

            //Handle Value
            outRow.push(cellValue !== "" ? cellValue : null);

            //Handle Colspan
            if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
        }
        out.push(outRow);
    }
    return [out, ranges];
}

function datenum(v, date1904) {
    if (date1904) v += 1462;
    var epoch = Date.parse(v);
    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
}

function sheet_from_array_of_arrays(data, opts) {
    var ws = {};
    var range = {
        s: {
            c: 10000000,
            r: 10000000,
        },
        e: {
            c: 0,
            r: 0,
        },
    };
    for (var R = 0; R != data.length; ++R) {
        for (var C = 0; C != data[R].length; ++C) {
            if (range.s.r > R) range.s.r = R;
            if (range.s.c > C) range.s.c = C;
            if (range.e.r < R) range.e.r = R;
            if (range.e.c < C) range.e.c = C;
            var cell = {
                v: data[R][C],
            };
            if (cell.v == null) continue;
            var cell_ref = XLSX.utils.encode_cell({
                c: C,
                r: R,
            });

            if (typeof cell.v === "number") cell.t = "n";
            else if (typeof cell.v === "boolean") cell.t = "b";
            else if (cell.v instanceof Date) {
                cell.t = "n";
                cell.z = XLSX.SSF._table[14];
                cell.v = datenum(cell.v);
            } else cell.t = "s";

            ws[cell_ref] = cell;
        }
    }
    if (range.s.c < 10000000) ws["!ref"] = XLSX.utils.encode_range(range);
    return ws;
}

function Workbook() {
    if (!(this instanceof Workbook)) return new Workbook();
    this.SheetNames = [];
    this.Sheets = {};
}

function s2ab(s) {
    var buf = new ArrayBuffer(s.length);
    var view = new Uint8Array(buf);
    for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
    return buf;
}

// 该方法负责将数组转化成二维数组
export function formatJson(headers, rows) {
    //首先遍历数组
    return rows.map((item) => {
        // item是对象  => 转化成只有值的数组 => 数组值的顺序依赖headers  {username: '张三'  }
        // Object.keys(headers)  => ["姓名", "手机号",...]
        return Object.keys(headers).map((key) => {
            return item[headers[key]]; // 得到 ['张三'，’129‘，’dd‘,'dd']
        });
    });
}

export function export_table_to_excel(id) {
    var theTable = document.getElementById(id);
    var oo = generateArray(theTable);
    var ranges = oo[1];

    /* original data */
    var data = oo[0];
    var ws_name = "SheetJS";

    var wb = new Workbook(),
        ws = sheet_from_array_of_arrays(data);

    /* add ranges to worksheet */
    // ws['!cols'] = ['apple', 'banan'];
    ws["!merges"] = ranges;

    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;

    var wbout = XLSX.write(wb, {
        bookType: "xlsx",
        bookSST: false,
        type: "binary",
    });

    saveAs(
        new Blob([s2ab(wbout)], {
            type: "application/octet-stream",
        }),
        "test.xlsx"
    );
}

export function export_json_to_excel({
    multiHeader = [],
    header,
    data,
    filename,
    merges = [],
    autoWidth = true,
    bookType = "xlsx",
} = {}) {
    var a = [];

    data.forEach((item, index) => {
        // 假设 item 是一个字符串，将其中的逗号替换为制表符  
        var replacedItem = item.toString().replace(/,/g, '\t') + "\n"
        // 将替换后的字符串添加到数组 a 中  
        a.push(replacedItem)
    });
    navigator.clipboard.writeText(a);
    // /* original data */
    // filename = filename || "excel-list";
    // data = [...data];
    // // data.unshift(header);

    // for (let i = multiHeader.length - 1; i > -1; i--) {
    //     data.unshift(multiHeader[i]);
    // }

    // var ws_name = "SheetJS";
    // var wb = new Workbook(),
    //     ws = sheet_from_array_of_arrays(data);

    // if (merges.length > 0) {
    //     if (!ws["!merges"]) ws["!merges"] = [];
    //     merges.forEach((item) => {
    //         ws["!merges"].push(XLSX.utils.decode_range(item));
    //     });
    // }

    // if (autoWidth) {
    //     /*设置worksheet每列的最大宽度*/
    //     const colWidth = data.map((row) =>
    //         row.map((val) => {
    //             /*先判断是否为null/undefined*/
    //             if (val == null) {
    //                 return {
    //                     wch: 10,
    //                 };
    //             } else if (val.toString().charCodeAt(0) > 255) {
    //                 /*再判断是否为中文*/
    //                 return {
    //                     wch: val.toString().length * 2,
    //                 };
    //             } else {
    //                 return {
    //                     wch: val.toString().length,
    //                 };
    //             }
    //         })
    //     );
    //     /*以第一行为初始值*/
    //     let result = colWidth[0];
    //     for (let i = 1; i < colWidth.length; i++) {
    //         for (let j = 0; j < colWidth[i].length; j++) {
    //             if (result[j]["wch"] < colWidth[i][j]["wch"]) {
    //                 result[j]["wch"] = colWidth[i][j]["wch"];
    //             }
    //         }
    //     }
    //     ws["!cols"] = result;
    // }

    // /* add worksheet to workbook */
    // wb.SheetNames.push(ws_name);
    // wb.Sheets[ws_name] = ws;

    // var wbout = XLSX.write(wb, {
    //     bookType: bookType,
    //     bookSST: false,
    //     type: "binary",
    // });
    // saveAs(
    //     new Blob([s2ab(wbout)], {
    //         type: "application/octet-stream",
    //     }),
    //     `${filename}.${bookType}`
    // );
}